An innovative new drug can prevent heart attacks and strokes by cutting bad cholesterol to unprecedented levels, say doctors.

The results of the large international trial on 27,000 patients means the drug could soon be used by millions.

The British Heart Foundation said the findings were a significant advance in fighting the biggest killer in the world.Around 15 million people die each year from heart attacks or stroke.

Bad cholesterol is the villain in the heart world – it leads to blood vessels furring up, becoming easy to block which fatally starves the heart or brain of oxygen.

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